Tektronix KEITHLEY SourceMeter 2600B Series User Manual page 82

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Section 4: Operation

Series 2600B System SourceMeter® instrument User's Manual

Using shielding and guarding together

The following figures show connections for a test system that uses a noise shield, a safety shield, and

guarding. The guard shields are connected to the driven guard (labeled G or GUARD, depending on

your model) of the SMU. The noise shield is connected to LO. The safety shield is connected to the

chassis and to protective earth (safety ground).

Connect the enclosure of all metal test fixtures to protective earth (safety ground). See your

specific test fixture for information. Nonconductive test fixtures must be rated to double the

maximum capability of the test equipment in the system.

Figure 36: Connections for noise shield, safety shield, and guarding

1 Test circuit

2 Metal guard shield

3 Metal noise shield

4 Metal safety shield

5 Protective earth (safety ground)

6 Low-noise chassis ground banana jack

7 Chassis screw

8 Chassis

4-22

2600BS-900-01 Rev. A / August 2021

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